Dice the strawberries and mix with 1 tsp of granulated sugar. Add the sugared strawberries to a mesh sieve over a bowl and allow them to drain in the fridge until ready to use.
Chop the butter into small cubes and place in the freezer.
In a small mixing bowl, combine the milk, egg, lemon zest, and vanilla extract. Place in the fridge to chill.
In a large mixing bowl, combine the dry ingredients - the flour, baking powder, ⅓ cup sugar, and salt.
Add the butter to the flour mixture. Rub or cut the butter into the flour until the texture of the mixture resembles coarse sand.
Add the drained strawberry pieces to the dry ingredients and stir, making sure each piece of fruit is coated in flour.
Pour the wet ingredients into the flour mixture, stirring until a thick dough forms.
Turn the dough out onto a floured surface and form it into a disc, about 1 inch thick. Slice the disc into 8 equal-sized triangles.
Transfer the scones onto a parchment-lined baking tray and chill for at least 30 minutes. While the scones are chilling, preheat the oven to 400°F.
Brush the top of each scone with heavy cream or milk and bake at 400°F for 20-22 minutes, or until the top of each scone is a light golden brown. Let them cool and enjoy!